MC33263 データシートの表示（PDF） - ON Semiconductor
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MC33263 Datasheet PDF : 12 Pages
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MC33263
If TJmax is internally limited to 150°C, then the MC33263
can dissipate up to 595 mW @ 25°C.
The power dissipated by the MC33263 can be calculated
+ ǀ @ ǁ ) ǀ * ǁ @ from the following formula:
Ptot Vin Ignd(Iout)
Vin Vout Iout
or
+ ) ) @ Vinmax
Ptot Vout Iout
Ignd Iout
If a 150 mA output current is needed, the ground current
is extracted from the data–sheet curves: 6.5 mA @ 150 mA.
For a MC33263NW28R2 (2.8 V), the maximum input
voltage will then be 6.48 V, a rather comfortable margin.
Typical Application – The following figure portraits the
typical application for the MC33263 where both
input/output decoupling capacitors appear.
Input
Output
Figure 2. Printed Circuit Board
Differential (Vin–Vout)
654
C3
1.0 mF
MC33263
123
On/Off
C1
10 nF
C2
1.0 mF
C3 MC33263
Input
+
+ C2
C1
Rpull–up
Output
Figure 1. A Typical MC33263 Application with
Recommended Capacitor Values
As for any low noise designs, particular care has to be
taken when tackling Printed Circuit Board (PCB) layout.
The following figure gives an example of a layout where
stray inductances/capacitances are minimized.
ON/OFF
Figure 3. Copper Side Component Layout
This layout is the basis for an MC33263 performance
evaluation board where the BNC connectors give the user an
easy and quick evaluation mean.
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